CN2035080U - Electric difference temperature meter - Google Patents
Electric difference temperature meter Download PDFInfo
- Publication number
- CN2035080U CN2035080U CN 88210396 CN88210396U CN2035080U CN 2035080 U CN2035080 U CN 2035080U CN 88210396 CN88210396 CN 88210396 CN 88210396 U CN88210396 U CN 88210396U CN 2035080 U CN2035080 U CN 2035080U
- Authority
- CN
- China
- Prior art keywords
- potential difference
- potentiometer
- deviation
- master
- difference meter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses a potential difference meter with temperature scales, a standard instrument of various secondary instruments verifying and matching with a thermocouple for temperature measurement. The master disc of the utility model is provided with temperature scales and various measuring ranges, aiming at various thermocouple measurements. The master disc graduation is 100 DEG C or 200 DEG C. The potential difference meter is also provided with a deviation disc with two-bit electric potential scales and two magnifications. When the potential difference meter is used for verifying the secondary instruments, a temperature-electric potential cross reference list is not needed, and measured instrumental errors can be directly read out from the deviation disc, which can simplify the operating performance and reduce operation times and human errors.
Description
The thermometric potential difference meter is a potential difference meter with temperature scale, is the reference instrument of the various secondary instruments of verification adapted thermocouple temperature measurement.Be fit in on-the-spot and the laboratory calibrating and verification to movable coil indicator table, digital temperature measurer, self-poise potential difference meter and various temperature controllers.
The various secondary instruments of check adapted thermopair use the common electrical tentiometer at present, must be by " temperature-electromotive force " table of comparisons ability realization standard and tested comparison during verification.This thermometric potential difference meter master is a temperature scale, in addition, need not use " temperature-electromotive force " table of comparisons during check, and can directly read the error of tested instrument from the deviation dish with the deviation dish of electromotive force scale, the formality that can simplify the operation greatly reduces number of operations and human error.
The equalizing network principle of thermometric potential difference meter such as accompanying drawing 1.Different with the common electrical tentiometer is that it has two compensation branch roads, and unknown electromotive force Ux is connected on the diagonal line of the bridge circuit that two branch roads constitute.The potentiometer RW of main compensation branch road (being called for short main branch road) is the non-linear step disc (being called for short temperature dish or master) by thermopair electromotive force calibration.Deviation compensation branch road (being called for short the deviation branch road) and common electrical tentiometer are similar, and it has adopted series connection replacement circuit, wherein R=R '.Two potentiometers respectively have 20 resistance, and zero-bit respectively has the deviation dish of 10 steppings in the centre about formation.R is a slide wire disc, about 100 evenly divideds are respectively arranged.More than two dishes keep ten to advance relation, i.e. R=10r.
Because R is arranged
1I
1=(1/2 R+, 1/2 r) I
2
Work as R
WIf, Ux=0 then bridge balancing during R and r dish nulling, when R and r brush move left and right, can constitute+-bucking voltage of both direction.When unknown electromotive force Ux, mainly by the compensation of temperature dish, and then make deviation compensation by two biased difference dishes, on three dishes, can read the error amount (millivolt value) of temperature value and tested instrument thus respectively.
What accompanying drawing 2 exemplified is the actual track of a thermometric potential difference meter.
In order to improve measuring accuracy, instrument is provided with * 1 and 0.1 multiplying power switch the deviation dish, has therefore Duoed a diverter branch than schematic diagram here.Master's branch current remains unchanged when multiplying power is changed.The equalizing network working current is 1.2mA.Multiplying power * 0.1 o'clock master's branch road and deviation branch road working current are 0.1mA, and diverter branch is 1mA, and maximum deflection difference value is ± 1.1mV that minimum calibration is 1 μ V.Multiplying power * 1 o'clock master's branch current still is 0.1mA, and the deviation branch current is 1mA, and the diverter branch electric current is 0.1mA, and maximum deflection difference value is ± 11mV that minimum calibration is 10 μ V.
In order to make instrument can adapt to the thermopair of multiple calibration, four potentiometers are arranged under the master, by the switch sorting, so instrument is applicable to four kinds of thermopairs.Also potentiometer wherein can be designed to a millivolt scale, make instrument have the function of common electrical tentiometer concurrently.For main branch road resistance after making the calibration conversion is constant, before each potentiometer, be furnished with additional resistance, make each bar circuit resistance identical (being designed to 800 Ω among the figure).No matter above-mentioned four potentiometers all are converted into 10 Ω for every millivolt by thermoelectrical potential calibration or millivolt calibration.
Instrument uses power supply to be 1.5V, and setting up working current by two potentiometers by standard cell EN is ratings.
Use for convenience, the deviation dish+-direction marks opposite with bucking voltage polarity by tested site error direction.
This Figure of description catalogue is as follows:
Accompanying drawing 1: the equalizing network basic circuit diagram of thermometric potential difference meter
Accompanying drawing 2: thermometric potential difference meter basic circuit diagram
Claims (3)
1, measure the potential difference meter of unknown electromotive force with penalty method, the compensating circuit that it mainly partly is made up of the potentiometer and the resistance of measuring disk interlock, this thermometric potential difference meter is the special-purpose potential difference meter that is specifically designed to the secondary instrument of verification adapted thermocouple temperature measurement, relatively it is characterized in that with the common electrical tentiometer: this instrument has two compensating circuits, use the measuring disk of two kinds of different scales to compensate measurement, master on the main compensation branch road is a temperature scale, the master potentiometer is by the pairing thermoelectrical potential value of electric thermo-couple temperature calibration, deviation dish zero-bit on the deviation branch road is in the centre, scale is the millivolt value that positive and negative both direction is arranged, deviation dish potentiometer calibration is identical with dish, unknown electromotive force is connected on the brush of above-mentioned two potentiometers, become the diagonal line of the bridge circuit that two branch roads constitute, make bucking voltage equal the algebraic sum of the electromotive force that two potentiometers provide.
2, master as claimed in claim 1 is characterized in that: but several potentiometers of interlock, and each potentiometer can be connected arbitrary potentiometer circuit by a kind of thermopair calibration by the selector switch before the master, constitutes the multiple amount limit of instrument.
3, several potentiometers as claimed in claim 2 is characterized in that: can be with 1 potentiometer wherein by millivolt calibration, and be higher than order of magnitude of deviation dish on the numerical value, then can constitute the common electrical potential difference metering limit of instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88210396 CN2035080U (en) | 1988-04-11 | 1988-04-11 | Electric difference temperature meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88210396 CN2035080U (en) | 1988-04-11 | 1988-04-11 | Electric difference temperature meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2035080U true CN2035080U (en) | 1989-03-29 |
Family
ID=4843897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88210396 Expired - Lifetime CN2035080U (en) | 1988-04-11 | 1988-04-11 | Electric difference temperature meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2035080U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330967C (en) * | 2005-04-22 | 2007-08-08 | 骆乃光 | Portable potential difference meter |
| CN1330966C (en) * | 2005-04-22 | 2007-08-08 | 骆乃光 | Portable potential difference meter with high resolution ratio |
| CN100348985C (en) * | 2005-07-29 | 2007-11-14 | 骆乃光 | Three range potentiometer employing shunt current and branch current |
| CN100348987C (en) * | 2005-07-31 | 2007-11-14 | 骆乃光 | DC potentiometer with introduced shunting branch for reducing measurement range |
| CN100348986C (en) * | 2005-09-09 | 2007-11-14 | 骆乃光 | Direct current potential difference method of three measuring range conversion |
| CN100354633C (en) * | 2005-04-22 | 2007-12-12 | 骆乃光 | Potential difference meter with seven bit reading |
| CN100367036C (en) * | 2005-09-09 | 2008-02-06 | 骆乃光 | Three range transforming portable potentiometer |
| CN100367037C (en) * | 2005-12-27 | 2008-02-06 | 骆乃光 | Three-range switching DC potentiometer having four measurement disks and employing shunt branch |
| CN100375901C (en) * | 2005-12-28 | 2008-03-19 | 骆乃光 | Three-measuring range DC potential difference meter with five's place reading utilizing, shunt branch |
| CN100434922C (en) * | 2005-07-29 | 2008-11-19 | 骆乃光 | Three range transforming potentiometer employing shunt current and branch current |
| CN100445751C (en) * | 2005-12-27 | 2008-12-24 | 骆乃光 | Two-range switching DC potentiometer having five-digit reading and employing transposition branch |
| CN104034448A (en) * | 2014-05-27 | 2014-09-10 | 安徽省计量科学研究院 | Wiring device for detecting digital display temperature instrument matched with thermocouple |
| CN104833876A (en) * | 2015-04-29 | 2015-08-12 | 常州大学 | Battery charger temperature compensation analog device |
| CN107764433A (en) * | 2016-08-23 | 2018-03-06 | 哈尔滨飞机工业集团有限责任公司 | A kind of Inter-Turbine Temperature watch test device |
-
1988
- 1988-04-11 CN CN 88210396 patent/CN2035080U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354633C (en) * | 2005-04-22 | 2007-12-12 | 骆乃光 | Potential difference meter with seven bit reading |
| CN1330966C (en) * | 2005-04-22 | 2007-08-08 | 骆乃光 | Portable potential difference meter with high resolution ratio |
| CN1330967C (en) * | 2005-04-22 | 2007-08-08 | 骆乃光 | Portable potential difference meter |
| CN100348985C (en) * | 2005-07-29 | 2007-11-14 | 骆乃光 | Three range potentiometer employing shunt current and branch current |
| CN100434922C (en) * | 2005-07-29 | 2008-11-19 | 骆乃光 | Three range transforming potentiometer employing shunt current and branch current |
| CN100348987C (en) * | 2005-07-31 | 2007-11-14 | 骆乃光 | DC potentiometer with introduced shunting branch for reducing measurement range |
| CN100367036C (en) * | 2005-09-09 | 2008-02-06 | 骆乃光 | Three range transforming portable potentiometer |
| CN100348986C (en) * | 2005-09-09 | 2007-11-14 | 骆乃光 | Direct current potential difference method of three measuring range conversion |
| CN100367037C (en) * | 2005-12-27 | 2008-02-06 | 骆乃光 | Three-range switching DC potentiometer having four measurement disks and employing shunt branch |
| CN100445751C (en) * | 2005-12-27 | 2008-12-24 | 骆乃光 | Two-range switching DC potentiometer having five-digit reading and employing transposition branch |
| CN100375901C (en) * | 2005-12-28 | 2008-03-19 | 骆乃光 | Three-measuring range DC potential difference meter with five's place reading utilizing, shunt branch |
| CN104034448A (en) * | 2014-05-27 | 2014-09-10 | 安徽省计量科学研究院 | Wiring device for detecting digital display temperature instrument matched with thermocouple |
| CN104833876A (en) * | 2015-04-29 | 2015-08-12 | 常州大学 | Battery charger temperature compensation analog device |
| CN107764433A (en) * | 2016-08-23 | 2018-03-06 | 哈尔滨飞机工业集团有限责任公司 | A kind of Inter-Turbine Temperature watch test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2035080U (en) | Electric difference temperature meter | |
| Budovsky | A micropotentiometer-based system for low-voltage calibration of alternating voltage measurement standards | |
| CN106291034B (en) | It can self-calibrating resistance divider | |
| Mueller | Wheatstone bridges and some accessory apparatus for resistance thermometry | |
| CN202171514U (en) | circuit by utilizing double-constant current source | |
| US2886776A (en) | Multiple testing meter | |
| Hirayama et al. | 10-kV high-Accuracy dc voltage divider | |
| Williams et al. | A dual-channel automated comparator for ac-dc difference measurements | |
| Anand | Electronic Instruments and Instrumentation Technology | |
| US2083408A (en) | Potentiometer | |
| CN1041235C (en) | Unbalance/balance electric bridge temperature measuring method and its device | |
| Braudaway | The costs of calibration | |
| CN209085802U (en) | A kind of portable multi-channel temperature testing device control system | |
| Mikhal et al. | Simple methods to measure the additive error and integral nonlinearity of precision thermometric bridges | |
| US3495169A (en) | Modified kelvin bridge with yoke circuit resistance for residual resistance compensation | |
| Malaric et al. | Voltage ratio measurements using two digital voltmeters and resistive voltage divider | |
| SU842628A1 (en) | Method of measuring precision electric resistor relative deviation | |
| SU708174A1 (en) | Temperature difference measuring device | |
| SU105873A1 (en) | Device for calibration of electrical measuring instruments | |
| JPH02287163A (en) | Measuring method for resistance value | |
| Kinard et al. | Automated thermal voltage converter intercomparisons | |
| CA1107832A (en) | Multipoint measuring device | |
| Brooks | Calibration procedures for direct-current resistance apparatus | |
| Boella et al. | Comparison of different methods for the calibration of standard resistors in the range 10 MΩ÷ 1 GΩ | |
| Shneider | Calibrators for testing dc ammeters and voltmeters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 110003 No. 59 Heping North Street, Shenyang, Liaoning (northeast electromechanical building) Applicant after: Fu Dipeng Address before: No. 3, Heping Avenue, Liaoning, Shenyang, 79 Applicant before: Fu Dipeng |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT ADDRESS; FROM: NO. 79, DUAN, 3, HEPINGDA STREET, SHENYANG CITY, LIAONING PROVINCE TO: (DONGBEIJIDIAN BUILDING, NO. 59, HEPINGBEIDA STREET, SHENYANG CITY, LIAONING PROVINCE, 110003 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |